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<h1 id="read-from-an-arbitrary-table">Read from an Arbitrary Table<a class="headerlink" href="#read-from-an-arbitrary-table" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h1>
<p>This scenario demonstrate how to read all of the rows/columns of a table when the table name is only known at run time. </p>
<h2 id="scenario-prototype">Scenario Prototype<a class="headerlink" href="#scenario-prototype" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<pre><code class="cs">public interface IArbitraryTableReadScenario&lt;T&gt;
{
    T GetAll(string schema, string tableName);
}
</code></pre>

<h2 id="ado.net">ADO.NET<a class="headerlink" href="#ado.net" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<div class="alert alert-danger"><span class="alert-title"><i class="fa fa-times-circle"></i> Danger!</span><p>Verify that the schema and table name exist to avoid SQL injection attacks.</p>
</div><pre><code class="cs">public class ArbitraryTableReadScenario : SqlServerScenarioBase, IArbitraryTableReadScenario&lt;DataTable&gt;
{
    public ArbitraryTableReadScenario(string connectionString) : base(connectionString)
    { }

    public DataTable GetAll(string schema, string tableName)
    {
        //WARNING: Verify that the schema and table name exist to avoid SQL injection attacks.
        string sql = $&quot;SELECT * FROM [{schema}].[{tableName}];&quot;;

        var result = new DataTable();

        using (var con = OpenConnection())
        using (var cmd = new SqlCommand(sql, con))
        using (var reader = cmd.ExecuteReader())
            result.Load(reader);

        return result;
    }
}
</code></pre>

<h2 id="chain">Chain<a class="headerlink" href="#chain" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>Chain will verify the table exists before executing the query to ensure that SQL injection is not possible.</p>
<pre><code class="cs">public class ArbitraryTableReadScenario : IArbitraryTableReadScenario&lt;DataTable&gt;
{
    readonly SqlServerDataSource m_DataSource;

    public ArbitraryTableReadScenario(SqlServerDataSource dataSource)
    {
        m_DataSource = dataSource;
    }

    public DataTable GetAll(string schemaName, string tableName)
    {
        return m_DataSource.From(schemaName + &quot;.&quot; + tableName).ToDataTable().Execute();
    }
}
</code></pre>

<pre><code class="cs">public class ArbitraryTableReadScenario2 : IArbitraryTableReadScenario&lt;IReadOnlyList&lt;IReadOnlyDictionary&lt;string, object?&gt;&gt;&gt;
{
    readonly SqlServerDataSource m_DataSource;

    public ArbitraryTableReadScenario2(SqlServerDataSource dataSource)
    {
        m_DataSource = dataSource;
    }

    //This version returns a lightweight object known as a &quot;Table&quot;. It is an alternative to .NET's DataTable.
    public IReadOnlyList&lt;IReadOnlyDictionary&lt;string, object?&gt;&gt; GetAll(string schemaName, string tableName)
    {
        return m_DataSource.From(schemaName + &quot;.&quot; + tableName).ToTable().Execute().Rows;
    }
}
</code></pre>

<h2 id="dapper">Dapper<a class="headerlink" href="#dapper" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<div class="alert alert-danger"><span class="alert-title"><i class="fa fa-times-circle"></i> Danger!</span><p>Verify that the schema and table name exist to avoid SQL injection attacks.</p>
</div><pre><code class="cs">public class ArbitraryTableReadScenario : ScenarioBase, IArbitraryTableReadScenario&lt;DataTable&gt;
{
    public ArbitraryTableReadScenario(string connectionString) : base(connectionString)
    { }

    public DataTable GetAll(string schema, string tableName)
    {
        //WARNING: Verify that the schema and table name exist to avoid SQL injection attacks.
        string sql = $&quot;SELECT * FROM [{schema}].[{tableName}];&quot;;

        var result = new DataTable();

        using (var con = OpenConnection())
        using (var reader = con.ExecuteReader(sql))
            result.Load(reader);

        return result;
    }
}
</code></pre>

<h2 id="dbconnector">DbConnector<a class="headerlink" href="#dbconnector" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="entity-framework-6">Entity Framework 6<a class="headerlink" href="#entity-framework-6" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="entity-framework-core">Entity Framework Core<a class="headerlink" href="#entity-framework-core" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<div class="alert alert-danger"><span class="alert-title"><i class="fa fa-times-circle"></i> Danger!</span><p>Verify that the schema and table name exist to avoid SQL injection attacks.</p>
</div><pre><code class="cs">public class ArbitraryTableReadScenario : IArbitraryTableReadScenario&lt;DataTable&gt;
{
    private readonly Func&lt;OrmCookbookContext&gt; CreateDbContext;

    public ArbitraryTableReadScenario(Func&lt;OrmCookbookContext&gt; dBContextFactory)
    {
        CreateDbContext = dBContextFactory;
    }

    public DataTable GetAll(string schema, string tableName)
    {
        using OrmCookbookContext context = CreateDbContext();
        using DbCommand commnd = context.Database.GetDbConnection().CreateCommand();
        string sql = $&quot;SELECT * FROM [{schema}].[{tableName}];&quot;;
        commnd.CommandText = sql;
        commnd.Connection!.Open();
        using DbDataReader reader = commnd.ExecuteReader(CommandBehavior.CloseConnection);
        var result = new DataTable();
        result.Load(reader);
        return result;
    }
}
</code></pre>

<h2 id="linq-to-db">LINQ to DB<a class="headerlink" href="#linq-to-db" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="llblgen-pro">LLBLGen Pro<a class="headerlink" href="#llblgen-pro" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="nhibernate">NHibernate<a class="headerlink" href="#nhibernate" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="repodb">RepoDb<a class="headerlink" href="#repodb" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>
<h2 id="servicestack">ServiceStack<a class="headerlink" href="#servicestack" title="Permalink to this headline"><i class="fa fa-link" aria-hidden="true"></i></a></h2>
<p>TODO</p>

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